-3.11% is the change from 515 to 499
Calculation steps:
[( 499 - 515 ) ÷ 515] x 100 = -3.11%
Formula
Percentage change = [(499 - 515) / 515] x 100
Subtract the new number by the original number
499 - 515 = -16
-16 ÷ 515 = -0.031067961165048542
-0.031067961165048542 x 100 = -3.11%